OK, so im trying to get picture 1 to be the picture on the puzzle. I’ve managed to make a material of it, but as you can see in pic 2, when i click all the pieces it only shows the top left corner, what did i do wrong? 
Hello Dylan, you will need to learn how to unwrap meshes.
just google “Unwrap texture name of 3d program you use”
That should help you 
well, to be honest, I imported the picture into unreal, so i don’t exactly have a 3d program to use, but i will search that and replace the 3d program with unreal engine.